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Earth Chgs Ring of Fire Question
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  1. #1
    Join Date
    May 2004
    Location
    Potato Country
    Posts
    5,034

    Ring of Fire Question

    How come there is so much activity along the Ring of Fire on the East coasts of Asia and those other countries, and not the Western Coast line of North America, Mexico and Canada? I've seen activity along the South America coastlines, but never much further north.

    Not that I'm complaining, I guess the plates are shifting that direction...or there is some other dynamic causing it...

  2. #2
    Join Date
    May 2004
    Location
    Sandhills North Carolina
    Posts
    34,722
    I think the collisions are west plates nose diving under east plates Like a chain reaction on the interstate where cars plow into others causing additional wrecks

    Someone mentioned the 100% Atlantic American shoreline of beaches with vast shallow subfloors verses West Coast cliffs and rare beaches in California or Ireland or S America for example

  3. #3
    Join Date
    Jul 2006
    Location
    First Coast
    Posts
    1,079
    Plate Mechanics in a Nutshell

    The oceanic ridges provide the mechanism of plate movement. Newly formed ocean crust from the Atlantic Ridge forces the ocean bed westward toward North and South America. The ocean crust is locked onto the North American Plate so the westward motion is transferred to the west coast of North American.
    The east Atlantic Ocean Plate is locked onto the Eurasia and African Plates so that motion is transferred east.

    East and West plate movements meet at the western arc of the Ring of Fire. That's where to ocean crust plummets back into the mantle forming an oceanic trench. This subduction zone is the most active.

    The west coast of North America is not locked to the Pacific Plate and movement does occur laterally in California. The northern Pacific coast is subducting the Juan de Fuca plate therefore the Cascades are volcanic mountains.







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